Automatic mains switch VCX 4P 400V 125A - NLQ4-125/4P for PV

Product detailed description

The automatic grid switch monitors the availability of power from two different sources and switches between them automatically or manually as needed. Ideal for use in systems where power failure is not tolerated. Designed for DIN rail mounting. The VCX NLQ4-125/4P automatic transfer switch represents a high standard of safety, reliability and convenience for photovoltaic and backup power systems. It is suitable for professional use and demanding domestic applications. It provides uninterrupted power and peace of mind that your technology will work even in the event of a grid failure. Recommended as part of the equipment for hybrid and island PV systems. Main features - Operation mode: Automatic or manual - Installation: - DIN rail mounted - quick and easy installation in the cabinet Device Features: - Reliable power transfer - Excellent electrical insulation - Easy installation and maintenance - Long service life Application The switch is designed for locations where a continuous power supply is important, e.g: - Homes, Shopping malls, Factories, Laboratories, Agricultural facilities and farms Working principle In the event of an outage or abnormal condition of the main (normal) power supply, it immediately switches to the backup power supply, thus ensuring: - Uninterrupted power supply - Reliable and safe operation - Fast response without failure Design and materials - Housing material: Excellent flame retardant PC plastic, resistant to high temperature and aging - Contacts: Silver contacts to ensure excellent conductivity and reliable switching Millisecond switching - Fast response during failure - switching without loss of power - Compact design - Automatic and manual operation possible Technical specifications - Rated current (Ie): 125 A Maximum continuous current that can flow through the device without problems. - Insulation voltage (Ui): AC 690 V The highest voltage at which the insulation of the device will not be penetrated. - Operating voltage (Ue): AC 400 V, 50 Hz Standard operating voltage for conventional three-phase networks. - AC-31B Suitable for switching resistive and weakly inductive loads. - Number of poles: 4P Provides switching of all three phases including the neutral conductor. - Switching life (auto/manual): 2000/5000 cycles Number of reliable switching operations in automatic and manual mode. - Short circuit current (Icu): 50 kA Maximum current that the device can interrupt in the event of a short circuit. - Recommended protection: RT16-00-63A Safety fuse suitable for protecting the equipment. - Impulse resistance: 8 kV Surge resistance - especially important in environments with risk of surge spikes. - Control voltage (Us): AC 220 V / 50 Hz Voltage supplying the control mechanism of the switch. - Control voltage tolerance: 85-110 % Us The voltage range in which the device operates correctly. - Response time (circuit + switching): <50 ms Time required to switch from mains to backup power supply - extremely fast response. - Auxiliary circuit: 2 independent relays, each relay contains 2 sets of transformer contacts Provides additional signal or logic outputs for other automation elements. - Mounting: on DIN rail Allows easy integration into standard control cabinets and installation systems. - Dimensions (W x H x D): 141 x 104 x 76 mm Compact dimensions allow installation even in space-constrained enclosures. - Weight: 2.6 kg Robust and durable body adapted for long-term operation. Cautions and important installation information Rated control voltage of the device: AC 220-230 V - The device requires a stable voltage within this range for proper operation. - If the voltage drops below 190 V, the equipment may be damaged - overheating or destruction of internal components may occur. Control voltage (applies to AC 110 V variants) - Serious damage to the electronics may occur if the device is supplied with a voltage lower than 95 V. - This figure applies to models designed for 110V control - always check the specifications of the specific unit to be sure. Recommendations for safe operation: To protect the equipment, we recommend adding under-voltage and over-voltage protection to the installation, for example: - Overvoltage protection module (T1/T2/T3) - protects against overvoltage in the network. - Undervoltage protection - automatically disconnects the device if the voltage drops below a safe limit (e.g. 195 V), thus preventing damage to the device. Class B surge arrester (T1) - Purpose: Provides rough protection against direct lightning strikes and large surges.? - Installation Class C surge arrester (T2) - Purpose: Serves as a medium level of protection, limiting overvoltages caused by indirect lightning strikes and switching processes in the network.? - Installation Class D surge arrester (T3) - Purpose: Provides gentle protection for sensitive electronic equipment from residual overvoltage.? - Installation. When selecting specific models, it is important to consider the parameters of your electrical network and compatibility with other elements of the installation. We recommend that you consult a qualified electrician to ensure the correct choice and installation of surge protectors in accordance with the applicable standards. Installation and liability - Installation must only be carried out by a qualified person with a valid electrical qualification in accordance with the applicable CSN standards. - Improper installation or improper adjustment can lead to irreversible damage to the device, electric shock or fire. - Claims due to incorrect wiring or use contrary to the instructions will not be accepted. - The e-shop operator is not responsible for damages caused by unprofessional wiring, modifications or violation of installation instructions.